Although internal control systems in firms aim to provide reasonable assurance regarding objectives related operations, reporting, and compliance, research focusing on operational efficiency is limited. This study investigates the impact of both quantitative qualitative investments personnel a firm’s efficiency. Utilizing fixed-effect regression model, Heckman (1979) two-stage least squares pro...

Predictor-corrector (PC) methods for the numerical solution of stiff ODEs can be extended to include the second derivative of the solution. In this paper, we consider second derivative PC methods with the three-step second derivative Adams-Bashforth as predictor and two-step second derivative Adams-Moulton as corrector which both methods have order six. Implementation of the proposed PC method ...